Added visual studio solution and project files.
Updated jasmine, requirejs and sinon scripts via NuGet
Added sounds when starting and completing a pomodoro

    Added the howler library after banging my head against
    the Web Audio API for 20 minutes. So small pain threshold XD.

    Also added a wrapper AudioPlayer around it.

    Fixed unit tests to use mocks intead of the pomodoro timer
    itself. And added support to enable/disable sounds for those
    cases where I want to have integration tests yet I don't want
    sounds to play.